Extension-furnace.



R.:E. LE BLANG & P. P. LANDRY.

EXTENSION FUBNAGE.

APPLICATION FILED JAN. 24, 1912.

y1,@579855., 5' Patented Apr. 1, 1913.

' Y 2 snEnTs-SHEET 1.

femefmzdy R. E. LE BLANC & P. P. LANDRY.

EXTENSION FURNAGE.

APPLICATION FILED JILZ, 1912.

1,057,855. Patented Apr. `1, 1913.

2 SHEETS-SHEET 2.

in santas rematar onirica.

ROBERT E. LE BLANC AND PIERRE P, LANDRY, OF PAINCOURTVILLE, LQUISIAA.

EXTENSON-FURNACE.

Application led January 24, 1912.

Specification of Letters Patent.

Patented Apr. .1,1 913.

serial No. 673.038.

Be it known that we, Roiza'r' E. Ln BLANC and PInRRn P. LANDRY, citizens otl the United States, residing at Paincourtville, in the parish of Assumption and State of Louisiana, have invented new and useful improvements in EXtension-Furnaces, of ulrich the followine is a specification.

The invention relates to an extension furnace, and more particularly to the classl of Dutch ovens for use in internalh7 tired boiler furnaces.

The primary object of the invention is the provision of an extension furnace or Dutch oven in which a target is arranged for the tiring of the gases, and that will permit the requisite air to be admitted to the gases for'producing a maximum tempera ture when the same have been ignited, thus minimizing the quantity of fuel required for the tiring of the furnace.

Another object of the invention is'the provision of an extension furnace or Dutch oven in which oil or other liquid fuel may be used for the tiring thereof, and that may be used With various styles of boilers or furnace structures.

A further object of the invention is the provision of an extension furnace or Dutch oven which is simple in construction, reliable and efficientA in operation, and inexpensive to manufacture.

With these and other objects in view, the inventionv consists in the constructionv` combinat-ion and arrangement of parts. as will be hereinafter more fully described, illustrated in the accompanying drawings, and pointed out in the claims l'xereunto appended.

In the drawings: Figure 1 is a vertical longitudinal sectional View through an internallyI fired boiler, showing the Dutch oven or extension furnace mounted therein constructed in accordance with the invention. Fig. 2 is a vertical longitudinal sectional vieW through the Dutch oven or eX- tension furnace. Fig. 3 is an end elevation thereof. Fig. 4-.is a similar view. looking toward the opposite end. Fig. 5 is a sectional view on the line 5 5 of Fig. l. 5 is a fragmentary horizontal sectional view through the front Wall of the extension furnace. l l

Similar reference characters indicate-corresponding" parts throughout the several views of the drawings. I

-with the fire box therein.

ing adapted for use in any of the various constructions which are provided` with a fire box, and lilies or tubes connnunicating therewith. ln the instance herein shown, the boiler 5 is of the usual cylindrical form, and vhas extended therethrough a corrugated tubular wall G, forming a lire box surrounded by a vertical Water space 7 closed at opposite ends by means of end rings 8, as usual. Passed through the Water space 7, ahovil the .fire box, are the tlues or tubes 9 which direct the products of combustion from the fire box into a smoke box or stack 10. of the usual form, at the front end of the boiler. v

The extension furnace or Dutch oven comprises a cylindrical body ll, preferably constructed from metal, the outer surface of which is covered with suitable ire-proong material, such as asbestos l2, while the interior thereof is lined With suitable hre-brick 1?. the inner end of. the body 11 being provided Withoutturned bolt receiving ears or bruckcts1-1, through which are passed ordinary bolts, the saine being also passed through the end rings 8 at the front of the boiler, thereby securing the extension fur nace to the boiler, so that the same Will aline ot the front end ot the body '11 is c osed by a segmental-shaped front end plate 15, the same being secured thereto in any suitable manner, and is provided with a medial opening', through which is extended a burner tube 1G of any approved form tvhich projects interiorly of the body 11 and terminates in a burner nozzle 17 of any preferred form, a nd through this tube 16 is introduced oil fuel to the burner nozzle 17 for the tiring The up er half ico of the boiler furnace. At opposite sides of the burner tube 16 are arranged torches'lSl which project intcriorly of the body vl1 through suitable openings formed in the end plate l5.

Arranged Within the body l1., below the burner nozzle 17 and the torches d18, is a horizontalh7 disposed partition 19, the same being slightly downwardly curved, and forms beneath the same an air channel or o Stop Wall 2l which elevntes the air adniitted in the lower open portion ot the front end ot the said body into the path of the tlame issuing; troni the burner nozzle l?, inf teriorly of the body.

Formed onv the partition l5) and epm-ed inH wardly from the Stop Wall i5 a target 22, against which play the llame com tl burner nozzle 17 for the ignition ot ga within the said body ll. ot the l'ninnee Fixed to and depending troni the body 1l a snpl'ilemental hollow body 2?), the outer end of which extends beyond the :Front end of the main body l1, while its inner end terminates spaced from the innei-or rear end oi? said main body, and thisl rear end oft the supplemental body 23 normally eloeed by a damper Qd hinged or otherwise swingingly (zonnet-ted to the supplemental body 23, so that it may be opened, when desired, the Supplenlental body 23 being.` deSign-ed to nroride :1 het air conduitl or Chaniber Q5 therein, which-hoe its forward end in direct coniinnnieation with the gas conduit 2O in the main body 1l, and witb't-he lowero'pen portionQG at the front. end ot the said main body, so that oir may be let' into the main bodyr both at the front and rear ends` thereof, the partition lQbeing; of less length than the body l1. whereby air passing through the eondnit 20 will rise at the rear end of the main body 11 above the partition the-rein.

Closing the protrnded end et the supplemental body Q3, at the top thereof, is e lid or cover 27 which may be raised or removed to ,permit aeeees to be had thereto, the 'front end Vall of the supplemental body Q3 being' provided with peep openings QS normally Closed by ehuttee 29 piyoted at 30 to the front- 'Wall 0i. the Said slipplen'iental body. On the oiliening ot the damper Eel, air will be admitted into the hot air ehamber 9.5. whence a poition thereoI will be conveyed through the Conduit Q0 to the rear end of the main body 1.1, and will rise into the same above the partition 1Q, While the remaining portion '.will be let into the main body 1l through the lower openv portion 2G at the front end thereof, thus assuring the proper combustion of the gas-ee for obtaini-iu;- maxi mum heat, without an. exeeesive eonsnmption oit fuel` the oil fuel. being ted thi-(meh the burner tnb'e 1.6 to the burner nozzle l?. whence it ignited by the torehee` :oy usuel, an/d the contained in the main body 11 will be burned 'from the llame issuing from the burner nozzle, the latter bewenn@ ine` directed toward the target 2Q, as heretolfore set torth.

the tori-hee lil are removed from the openings in the front of the extension iturnaee, ait'ter the flame has been ignitefbissning ironi the burner nozzle 1T, and these iorehee are ot' the ordinary type.

ibut is Claimed is:

l. ein extension l'nrnaee for fire tube boilers eon'iprising a cylindrical body extending outwardly from the tire box ot the boileind eommunieutine therewith, a doWmJerdhJ bowed partition arranged interiorly ol the body and spaced 'from the bottoni thereof. said partition being extended longitudinally for the gr later port-ion oli the length of said body, an air deleetor wall .rising from the partition intermediate the ends thereof, a target rising from the par tition at a point spacedl rearwardly from the delieetor wall, a, supplemental body formed exteriorly of said first named body and extended below the bottoni thereof, and beyond the outer end of the same for oommnnioation withthe said .tiret named body, n damper-located at the inner end of Said. sup. pleinental body and a lid on the top of Said supplemental body beyond the outer end of the irst named body.

Q. An extension furnace 'lor tire tube boilers eon'lprsing a cylindrical body extending outwardly from. the fire. box ot the boiler and communieatingl tlierewitln a downwardly bowed partition arranged interiorly oit the body and spaced from the bottoni tl).e1eof,-eaid partition being ex'- tended longitudinally for the greater por tion ot the length of said body, an air de Heet-or Wall rising from the partition intermediate the ends thereof, a target. rising from the partition at :rpoint spaced rearwardly from the deieetor wall, a` supplemental body formed e'xteriorly of said tiret, named bodyand extended below the bottom thereof, and beyond the Outer end of the same for communication with the said first named body, a damper located at the inner end of said supplemental body and a lid on the top of said supplemental body beyond the outer end of the first named body. the said supplemental body being inovid-ed with a peep hole in its enter end and shut-ters normally closing said peep hole.

ln teetimony whereof we atiix our Signainree in presence ot two witnesses.

ROBERT E. LE BLANC: PIERRE P. LANDRY.

ll'itneeses z H. Jon. Vnnnn'r, E. J. CLIFToN. 

